Why Do O- and B-Type Stars Have Weaker Hydrogen Absorption

question 27

Multiple Choice

Why do O- and B-type stars have weaker hydrogen absorption lines than A-type stars?

• A) O- and B-type stars are cooler than A-type stars.
• B) A larger fraction of hydrogen atoms in O- and B-type stars is ionized.
• C) O- and B-type stars have converted much more of their hydrogen into heavier elements.
• D) A-type stars have a higher mass than O- and B-type stars and they have more hydrogen.

---

Definitions:

Comprehensive Job Analysis

Comprehensive Job Analysis involves systematically studying and recording the responsibilities, duties, skills, and work environment of a particular job to determine its specifications and requirements.

Human Resource Personnel

Individuals working in the human resources department, involved in managing employee relations, benefits, recruitment, and compliance.

Human Factors Approach

A discipline focused on understanding the interactions between humans and other elements of a system, aiming to optimize human well-being and overall system performance.

Stress And Fatigue

Refers to the physical and psychological strain or exhaustion often resulting from intense workload, demanding schedules, or challenging environments.